[Nix-dev] Should we switch the default Haskell compiler to GHC 7.4.2?

[Andres Loeh]

Hi Peter.

> There's currently a second RC for HP 2012.4.0.0 which will be based on
> 7.4.2. I don't see why we cannot wait this one extra week until it's
> actually released. Apart from that, I have no serious objections.

HP 2012.4.0.0 has been released. No further changes since the last RC.
So all the preferences for the HP are implemented as
haskellPlatformArgs_2012_4_0_0, and there's a Haskell packages
attribute using those preferences as haskellPackages_ghc742_pedantic.

I have no problems of switching the default to be that set of Haskell
packages now.

However, there's still the question how many packages currently are
affected by vector-0.10 and primitive-0.5 ...

Cheers,
  Andres